Posted - 29 Jul 2011 : 11:59:59 size 60 jet fitted and the idle is perfect..no choke on start and steady tick over..the adjusting screw now sits at 1 1/2 turns..exactly where it should be...a quick blast around the block to bring her up to temperature and she idled perfectly after an emergency stop..no stalling. I upped the revs to 900 and have advanced the dizzy a tiny bit..yet again I had to adjust the points so they are coming out and i'm going to give the electronic points a go.

I needed a magnifing glass and a bright light to fine the emulsion tube no., it should be there somewhere.

Still not fitted, maybe later this week. TOO many other jobs.

pchristy

Posted - 26 Jul 2011 : 13:18:45 My experience with car instruments is that they are often more accurate than we might expect! Certainly the speedos in my current cars are almost spot on (comparing with the SatNav, which has to be accurate!) whereas my modern car, which I've just disposed of, was about 5 mph optimistic at 70. And the cheap dashtop tacho in my 96 was spot on when I checked its calibration - something I wasn't expecting!

--Pete"Duct tape is like the Force: It has a light side and a dark side, and it binds the Universe together!"

thesaabologist

Posted - 26 Jul 2011 : 09:59:12 Great thread.

I need to get a tacho on mine (who knows what the dash rev counter is reading)- I think its idling ok around 900-1000 revs (based on the last time I tacho'ed it).

The low speed running could be smoother - especially when hot. I sorted some of the idle/low speed issues by advancing the timing.

I might go up an idle jet size and see what happens (tempting fate however - took me 6 months to get it to run with the current level of smoothness).

---------------1974 Sonett III

pchristy

Posted - 25 Jul 2011 : 19:51:47

quote:Originally posted by john-saabTotally agree Peter..my idle needle was almost hanging out with the 50 jet.....

Hmm! Mine wasn't that far out - 3 turns, in fact! Are you sure you don't have an air leak somewhere? Might be worth checking the crankcase ventilation valve. These do get very cruddy, and if its not shutting at high vacuum, it will make the mixture in the manifold very lean.

I invested in a small ultra-sonic cleaner from Maplins, and gave my valve a very thorough cleaning whilst I was re-fitting things. The amount of grot that came out of it was truly amazing!

As a side benefit, I can now also clean the missus jewellery, which is keeping her sweet as well!

--Pete"Duct tape is like the Force: It has a light side and a dark side, and it binds the Universe together!"

john-saab

Posted - 25 Jul 2011 : 19:43:13 Totally agree Peter..my idle needle was almost hanging out with the 50 jet, I couldn't get the balance between a low idle and smooth low down acceleration..i had a 55 in my spare carb and that's 1/2 way out..that helps with a steady idle but i still have a hiccup when the revs drop towards idle..I sent FRC an email referring your recent buy so hopefully Anthony will know what he sent you.I have a long drive at the weekend so hopefully it will be here by then.